Recently my check engine light came on. When driving the car it can switch gears fine up until I reach around 40mph. Then it wont switch gears to go any faster. Sometimes it will switch but most of the times it sounds like its trying but doesn't. I put the OBDII scanner in and it came up with one code P0734 (gear 4 incorrect ratio). What should I check for besides the tranny oil and filter? How much can it cost to repair if I have to take it to a shop?
I hope to fix it myself instead of forking it over to a shop.
More likely is transmission problem it could cost up tp $2000.00
SOURCE: auto transmission will not engage in DRIVE gear when starting.
IT IS THE STRAINER INSIDE THE PAN IN THE TRANSMISSION,WHEN ITS COOL THE FLUID IS TO THICK TO TRAVEL AND GRITTY TO GO THROUGH THE STRAINER SCREEN,BUT WHEN THE TRANNY WARMS THE FLUID ITS THEN ABLE TO FLOW THROUGH THE SCREEN AND SHIFT PROPERLY.
SOURCE: 98 Intrepid Gone into "Limp Mode"
There are some sensors on the transmission that tend to go bad. You may also need to check the wiring. Could be a computer problem. How many miles?
SOURCE: My Mazda 626 Wont go into Drive
Sounds like you have lost the transmission. There are bands that clamp down to lock the transmission into the gear you want. They are controlled by a hydrolic unit located in the trans. The first thing I would do is have a shop pull the trans oil pan and see if it is full of chips of metal. If so you definately have a problem. At the same time they can look at the bands and see if one of them is broken. another cause would be that metal has gotten into the hydrolic valve body and frozen the drive band portion so it will not function. You may also get lucky and have it be an internal adjustment of the drive band. Good Luck, RAC
SOURCE: auto transmition wont go into 3rd and 4th gear
I had the same problem I changed the transmission fluid & put a new filter in the trans, this fixed it good until I put my foot down to overtake the trans kicked down to 2nd gear & the hold light started flashing again & the trans started slipping again. I stressed over it for a day or 2 & then I took it out for a drive & thrashed it, Low & behold it came right. When you change fluid its impossible to get all the old fluid out because the torque converter holds a liter or two under pressure, so when I put my foot down some of the gunk blew through & blocked the pump it looses pressure & cant change gear. You need to get it flushed by a transmission specialist
SOURCE: Mazda 626 - Hard to shift into gear.
With any vehicle that has a hydraulic clutch, a worn master cylinder or slave cylinder will give this very symptom. First step is to check the fluid in the resivor. If it is low, you will want to check for fluid bypassing the seals. Be sure to check under the rubber dust cover as fluid can collect there and not be readily visible. Also, if the fluid in the resivor is dark colored, it is an indication of the internal seals going bad and you will need to replace the cylinders.
Trouble Code Conditions:
Vehicle driven to a speed of 4-37 mph at more than 500 rpm, gear selector in 4th Gear in Drive, and the PCM detected too much difference in the engine speed and output shaft speed.
Possible Causes:
Trouble Code Conditions:
Vehicle driven any forward Gear, and the TCM detected the ratio of the Input speed to the Output Speed did not match the current Gear Ratio (this test can take up to 5 minutes).
Possible Causes:
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I have the same problem with my 2004 Hyundai accent. The p0734 gear 4 incorrect radio. I wish i can just to the damn light off. Any idea how to shut it off?
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